medium4.7
CVE-2026-40301
rhukster/dom-sanitizer: SVG <style> tag allows CSS injection via unfiltered url() and @import directives
Impact
DOMSanitizer is a DOM/SVG/MathML Sanitizer for PHP 7.3+. Prior to version 1.0.10, DOMSanitizer::sanitize() allows <style> elements in SVG content but never inspects their text content. CSS url() references and @import rules pass through unfiltered, causing the browser to issue HTTP requests to attacker-controlled hosts when the sanitized SVG is rendered. Version 1.0.10 fixes the issue.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| composer | rhukster/dom-sanitizer | < 1.0.10 | 1.0.10 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/rhukster/dom-sanitizer/commit/49a98046b708a4c92f754f5b0ef1720bb85142e2
- https://github.com/rhukster/dom-sanitizer/releases/tag/1.0.10
- https://github.com/rhukster/dom-sanitizer/security/advisories/GHSA-93vf-569f-22cq
- https://github.com/advisories/GHSA-93vf-569f-22cq
- https://nvd.nist.gov/vuln/detail/CVE-2026-40301